Brake for disk talking-machines.



W. ZEYSING.

BEAR FOB DISK TALKING MACHINES.

APPLIOATION rum) mm: 22, 1907.

%%68% Patented May 31, 1910.

2 SHEETS-SHEET 1.

Fig.1.

Fig.5.

Patented May 31, 1910.

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Wfmes SE 5 WALTER ZEYSING, OF STETTIN, GERMANYZ'.

BRAKE FOR DISK TALKING--MACHINES.

Specification of Letters Patent.

Patented May 31, 191%.

Application filed June 22, 1907. Serial No. 380,343.

To all whom it may concern:

Be it known that I, \VALTER Znysm e, merchant, a subject of the King of Prussia and German Emperor, residing at Stettm, 1n the county of Pommern and Empire of Gern'iany, have invented certain new and useful Improvements in Brakes for Disk Talking- Machines, of which the following is a speclfication.

My invention relates to improvementsm disk-talking machines ofthat class, 111 which the disk-record is automatically stopped at the completion of each reproduction. To accomplish such automatic stopping, the style running in the record-grooves of the disk is made to enter at the proper time into an empty or dead-groove specially provided, whereby the diaphragm-carrier is lowered as it approaches the center of the disk. By

lowering the arm of the diaphragm carrier, the-revolving motion of the disk-carrier will be stopped through the agency of brakemechanism actuated from the diaphragm carrier in its lowered position. The diskcarrier may be rotated in any known manner.

To make my invention properly understood, I have illustrated the same in the accompanying drawings,'in which Figure 1 is a plan of the record-disk with its empty or dead groove, the driving spindle and the arm carried at the to of the same. Fig. 2 is a side-elevation of tie casing, the disk-carrier and record-disk, the diaphragm and diaphragm-holder, the horn with its supporting bracket, and an arm attached to the diaphragm-holder, said arm being destined to engage the arm on top of the diskspindle. Fig. 3 is a View showing another modification of the means for holding the arm carried by the diaphragm holder. Fig. 4 is a view showing the diaphragm carrying an arm for engaging the arm on the disk-spindle. Fig. 5 1s a plan of another modification of the arm secured to the top of the disk-spindle. Fig. 6 is a side-elevation, partly in section, of a portion of the. casing, the diskcarrier and record disk with the driving spindle and brake-mechanism actuated by the same. Fig. 7 is an un derside View of a portion of the disk-carrier, with the brake-lever attached thereto, the brake-arm being shown in the raised or inoperative position. Fig. 8 is an underside view similar to Fig. 7, with the brakearm shown in theoperative position. Figs. 9, and 10, are, respectively, a side elevation of Figs. 7, and 8.

Reterring to Figs. 1, and 2, an arm 1/", is hinged to the upper end of the spind e b, of the disk-carrier a' the said arm, normally, extends at right angles to the said spindle b, but it may be raised in line with said spindle in order to strip the disk cl, off and put another disk on. The mode of securing the said arm f, to the spindle b,

is not essential; it might be removably' placed with a square hole on to a square portion at the top of spindle b, and held engaged there against accidental shifting by a spring-pawl w, m, as shown in Fig. 5. Thesaid arm, in Fig. 5, is designated by the reference-letter it. Any other means for securing the said arm to the spindle Z), might be. employed, to make said arm follow the rotary motion of the s indle and for allowing the disk (Z to be strlpped off the spindle. The means for im artmg rotary motion to the spindle d, and to the disk-carrier a, mounted on said spindle, are contained in the casing c, in the usual manner. To the said casing c, is secured the bracket 71., carrying the horn 2', and to said horn is attached the diaphragm-lever la, in the usual manner. The said arm f has a recess 9, adapted to be engaged by the hook r of a lever g, which has a sliding engagement as at p, with the bracket h, and is supported by a fork or yoke 11., carried by the diaphragm-lever is, the said fork or yoke making the said arm q follow the motions of said diaphragm-lever ]c, with suflicient play in the vertical direc tion for allowing the hook-shaped end 1', to descend into the recess 9, of the arm In the modification illustrated by Fig. 5, u, is the arm to be securedby a square hole on a square top of the spindle b, and to be held there by a pawl as, under the pressure of a spring w; e, is the notch or recess to be engaged by the hook r of lever 9.

According to the modification shown in Fig. 3, the hook r, is replaced by a hook 7' formed at the end of an arm 9 rigidly secured to the diaphragm-carrier I4 and according to another modification illustrated by Fig. 4, the said hook to enter the recess of the arm is formed by the projecting pin or finger r secured or formed to the periphery of the diaphragm m carried by the supporting arm [0 As soon as the hook-shaped end 1" of arm engagesthe recess 9 or" arm f, on spindle b, it will stop the rotary motion of said spindle I). But stopping motion by such engagement alone would put a very heavy strain upon the arm f, and spindle b, and the driying mechanism imparting motion to said spindle. 1, therefore, prefer to employ a brake mechanism for gradually and smoothly stopping the motion. To obtain such braking, the upper portion of the spin dle b is made hollow and within the bore is lodged a central stem 6 the upper end of which projects from the hollow spindle b, and carries the arm f hinged or removably secured to it, as before described. The said stem 6 has a pin y, fixed to it and projectin laterally through a spiral slot 6, in the si e of the hollow spindle 6, thereby coupling the stem to the spindle, as the latter is being rotated by the driving gear in the casing c. The said spiral slot extends to about a Quarter of the periphery of the spindle b. It will be seen, then, that, as the hook r engages the recess 9 of the arm 7', motion will not be entirely stopped at once, but the pin 3 of the stem will slide down in the slot 2?, and in its way down it will bear a ainst an arm 5, or crank, 01'' a shaft 2, carrie in bearings 4: secured to the lower side of the disk-carrier a. To the said shaft 2, is mounted an eccentric lever or brake my hand in the ceases arm 3, which, as the said shaft 2 is made to perform a partial turn, will come to act against the upper surface of the casing c.

I claim as my invention:

1. A talking-machine-brake mechanism comprising a disk record support, an axial support for said record support, upon which said record support rotates, a brake member for stopping the movement of said record support, a reproducer movable across said record support toward said axial support, a brake controlling member associated with said axial support, and means movable across said record support with said reproducer for causing the actuation of said brake member through said brake cont-rolling member.

'2. In a talking machine, the combination, with the disk-carrier, of a hollow central spindle to rotate the same, a spiral slot provided in said hollow spindle, a central stem located within the hollow spindle, a pin projecting from said central stem through the spiral slot, a brake lever under control or" said projecting pin, an arm mounted to the said central stem, and an arm connected to the diaphragm-carrier and adapted to engage the said arm on the central stem, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set presence of two witnesses.

WALTER ZEYSING. Witnesses FREDA ZEYSING,

Hans HILDEBRAND. 1 

